Effects of Tetraethyl Lead Concentration on Exhaust Emissions in Customer Type Vehicle Operation 690015

Effects of various concentrations of tetraethyl lead (TEL) on exhaust emissions were investigated. Eight Ford Galaxies equipped with production non-exhaust emission equipped 289-CID, 2-V engines were operated in customer service for 18,000 miles in the Detroit area. Four fuel blends were used in mileage accumulation — Indolene Clear (a full boiling range non-lead gasoline), Indolene 5 (Indolene Clear + 0.5 ml TEL/gallon in a motor mix blend*); Indolene 15 (Indolene Clear + 1.5 ml TEL/gallon in a motor mix blend), and Indolene 30 (Indolene Clear + 3.0 ml TEL/gallon in a motor mix blend). All engines were operated on the same petroleum base engine lubricant.
Exhaust emissions were monitored at approximately 3,000 mile intervals using the CMVPCB** seven-mode procedure. Additional seven-mode tests were obtained on each engine after combustion chamber deposits were removed at the completion of the mileage accumulation phase.
The increase in exhaust hydrocarbon (HC) emissions of vehicle operation on the leaded fuels was substantially higher than the HC increase of vehicles operated on Indolene Clear. At the 12,000 mile point, for example, the average HC increase for the leaded fuels was approximately 100 ppm as Hexane while the HC increase on Indolene Clear was negligible.
No deleterious effect, due to fuel used, was observed on any engine component.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Counteracting detrimental EGR effects with diesel fuel additive


View Details


Discussion of the Role of Fuel-Oil Diffusion in the Hydrocarbon Emissions from a Small Engine


View Details


Experimental Investigation of the Effect of Fuel Composition on the Formation of Pollutants in Direct Injection Diesel Engines


View Details